// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_H_
#define GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_H_

#include "base/memory/ref_counted.h"
#include "gpu/command_buffer/common/mailbox.h"
#include "gpu/gpu_export.h"

namespace gpu {
namespace gles2 {

    class Texture;

    // Manages resources scoped beyond the context or context group level.
    class GPU_EXPORT MailboxManager : public base::RefCounted<MailboxManager> {
    public:
        static scoped_refptr<MailboxManager> Create();

        // Look up the texture definition from the named mailbox.
        virtual Texture* ConsumeTexture(const Mailbox& mailbox) = 0;

        // Put the texture into the named mailbox.
        virtual void ProduceTexture(const Mailbox& mailbox, Texture* texture) = 0;

        // If |true| then Pull/PushTextureUpdates() needs to be called.
        virtual bool UsesSync() = 0;

        // Used to synchronize texture state across share groups.
        virtual void PushTextureUpdates(uint32 sync_point) = 0;
        virtual void PullTextureUpdates(uint32 sync_point) = 0;

        // Destroy any mailbox that reference the given texture.
        virtual void TextureDeleted(Texture* texture) = 0;

    protected:
        MailboxManager() { }
        virtual ~MailboxManager() { }

    private:
        friend class base::RefCounted<MailboxManager>;

        DISALLOW_COPY_AND_ASSIGN(MailboxManager);
    };

} // namespage gles2
} // namespace gpu

#endif // GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_H_
